Overall, there clearly was an inverse matchmaking between muscles proportions and you may f
o (Morton, 1977) as well as formant dispersion (Fitch, 1997). fo is the frequency at which membranes (the vocal folds in the case of humans) vibrate (see Lee and Mok https://datingmentor.org/nl/politieke-dating/, 2021 for a recent review), and is determined by body size – “(t)he larger the animal, the lower the sound frequency it can produce” (Morton, 1977, p. 864). Formant dispersion, or the averaged difference between successive formant frequencies, reflects one’s vocal tract length (Fitch, 1997), and in turn body size. (more…)